diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/mfd/Kconfig | 11 | ||||
| -rw-r--r-- | drivers/mfd/Makefile | 1 | ||||
| -rw-r--r-- | drivers/mfd/stmpe-i2c.c | 107 | ||||
| -rw-r--r-- | drivers/mfd/stmpe.c | 133 | ||||
| -rw-r--r-- | drivers/mfd/stmpe.h | 33 |
5 files changed, 195 insertions, 90 deletions
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig index 08a3e087bcea..7bc55819ab4a 100644 --- a/drivers/mfd/Kconfig +++ b/drivers/mfd/Kconfig @@ -279,6 +279,17 @@ config MFD_STMPE Keypad: stmpe-keypad Touchscreen: stmpe-ts +menu "STMPE Interface Drivers" +depends on MFD_STMPE + +config STMPE_I2C + bool "STMPE I2C Inteface" + depends on I2C + default y + help + This is used to enable I2C interface of STMPE +endmenu + config MFD_TC3589X bool "Support Toshiba TC35892 and variants" depends on I2C=y && GENERIC_HARDIRQS diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile index b2292eb75242..5eb90a70c1a5 100644 --- a/drivers/mfd/Makefile +++ b/drivers/mfd/Makefile @@ -16,6 +16,7 @@ obj-$(CONFIG_MFD_DM355EVM_MSP) += dm355evm_msp.o obj-$(CONFIG_MFD_TI_SSP) += ti-ssp.o obj-$(CONFIG_MFD_STMPE) += stmpe.o +obj-$(CONFIG_STMPE_I2C) += stmpe-i2c.o obj-$(CONFIG_MFD_TC3589X) += tc3589x.o obj-$(CONFIG_MFD_T7L66XB) += t7l66xb.o tmio_core.o obj-$(CONFIG_MFD_TC6387XB) += tc6387xb.o tmio_core.o diff --git a/drivers/mfd/stmpe-i2c.c b/drivers/mfd/stmpe-i2c.c new file mode 100644 index 000000000000..0a4365902e36 --- /dev/null +++ b/drivers/mfd/stmpe-i2c.c @@ -0,0 +1,107 @@ +/* + * ST Microelectronics MFD: stmpe's i2c client specific driver + * + * Copyright (C) ST-Ericsson SA 2010 + * Copyright (C) ST Microelectronics SA 2011 + * + * License Terms: GNU General Public License, version 2 + * Author: Rabin Vincent <rabin.vincent@stericsson.com> for ST-Ericsson + * Author: Viresh Kumar <viresh.kumar@st.com> for ST Microelectronics + */ + +#include <linux/i2c.h> +#include <linux/interrupt.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/types.h> +#include "stmpe.h" + +static int i2c_reg_read(struct stmpe *stmpe, u8 reg) +{ + struct i2c_client *i2c = stmpe->client; + + return i2c_smbus_read_byte_data(i2c, reg); +} + +static int i2c_reg_write(struct stmpe *stmpe, u8 reg, u8 val) +{ + struct i2c_client *i2c = stmpe->client; + + return i2c_smbus_write_byte_data(i2c, reg, val); +} + +static int i2c_block_read(struct stmpe *stmpe, u8 reg, u8 length, u8 *values) +{ + struct i2c_client *i2c = stmpe->client; + + return i2c_smbus_read_i2c_block_data(i2c, reg, length, values); +} + +static int i2c_block_write(struct stmpe *stmpe, u8 reg, u8 length, + const u8 *values) +{ + struct i2c_client *i2c = stmpe->client; + + return i2c_smbus_write_i2c_block_data(i2c, reg, length, values); +} + +static struct stmpe_client_info i2c_ci = { + .read_byte = i2c_reg_read, + .write_byte = i2c_reg_write, + .read_block = i2c_block_read, + .write_block = i2c_block_write, +}; + +static int __devinit +stmpe_i2c_probe(struct i2c_client *i2c, const struct i2c_device_id *id) +{ + i2c_ci.data = (void *)id; + i2c_ci.irq = i2c->irq; + i2c_ci.client = i2c; + i2c_ci.dev = &i2c->dev; + + return stmpe_probe(&i2c_ci, id->driver_data); +} + +static int __devexit stmpe_i2c_remove(struct i2c_client *i2c) +{ + struct stmpe *stmpe = dev_get_drvdata(&i2c->dev); + + return stmpe_remove(stmpe); +} + +static const struct i2c_device_id stmpe_i2c_id[] = { + { "stmpe811", STMPE811 }, + { "stmpe1601", STMPE1601 }, + { "stmpe2401", STMPE2401 }, + { "stmpe2403", STMPE2403 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, stmpe_id); + +static struct i2c_driver stmpe_i2c_driver = { + .driver.name = "stmpe-i2c", + .driver.owner = THIS_MODULE, +#ifdef CONFIG_PM + .driver.pm = &stmpe_dev_pm_ops, +#endif + .probe = stmpe_i2c_probe, + .remove = __devexit_p(stmpe_i2c_remove), + .id_table = stmpe_i2c_id, +}; + +static int __init stmpe_init(void) +{ + return i2c_add_driver(&stmpe_i2c_driver); +} +subsys_initcall(stmpe_init); + +static void __exit stmpe_exit(void) +{ + i2c_del_driver(&stmpe_i2c_driver); +} +module_exit(stmpe_exit); + +MODULE_LICENSE("GPL v2"); +MODULE_DESCRIPTION("STMPE MFD I2C Interface Driver"); +MODULE_AUTHOR("Rabin Vincent <rabin.vincent@stericsson.com>"); diff --git a/drivers/mfd/stmpe.c b/drivers/mfd/stmpe.c index 39efa629a19d..83bacde6a7cb 100644 --- a/drivers/mfd/stmpe.c +++ b/drivers/mfd/stmpe.c @@ -1,4 +1,6 @@ /* + * ST Microelectronics MFD: stmpe's driver + * * Copyright (C) ST-Ericsson SA 2010 * * License Terms: GNU General Public License, version 2 @@ -7,13 +9,11 @@ #include <linux/gpio.h> #include <linux/kernel.h> -#include <linux/module.h> #include <linux/interrupt.h> #include <linux/irq.h> +#include <linux/pm.h> #include <linux/slab.h> -#include <linux/i2c.h> #include <linux/mfd/core.h> -#include <linux/mfd/stmpe.h> #include "stmpe.h" static int __stmpe_enable(struct stmpe *stmpe, unsigned int blocks) @@ -30,10 +30,9 @@ static int __stmpe_reg_read(struct stmpe *stmpe, u8 reg) { int ret; - ret = i2c_smbus_read_byte_data(stmpe->i2c, reg); + ret = stmpe->ci->read_byte(stmpe, reg); if (ret < 0) - dev_err(stmpe->dev, "failed to read reg %#x: %d\n", - reg, ret); + dev_err(stmpe->dev, "failed to read reg %#x: %d\n", reg, ret); dev_vdbg(stmpe->dev, "rd: reg %#x => data %#x\n", reg, ret); @@ -46,10 +45,9 @@ static int __stmpe_reg_write(struct stmpe *stmpe, u8 reg, u8 val) dev_vdbg(stmpe->dev, "wr: reg %#x <= %#x\n", reg, val); - ret = i2c_smbus_write_byte_data(stmpe->i2c, reg, val); + ret = stmpe->ci->write_byte(stmpe, reg, val); if (ret < 0) - dev_err(stmpe->dev, "failed to write reg %#x: %d\n", - reg, ret); + dev_err(stmpe->dev, "failed to write reg %#x: %d\n", reg, ret); return ret; } @@ -73,10 +71,9 @@ static int __stmpe_block_read(struct stmpe *stmpe, u8 reg, u8 length, { int ret; - ret = i2c_smbus_read_i2c_block_data(stmpe->i2c, reg, length, values); + ret = stmpe->ci->read_block(stmpe, reg, length, values); if (ret < 0) - dev_err(stmpe->dev, "failed to read regs %#x: %d\n", - reg, ret); + dev_err(stmpe->dev, "failed to read regs %#x: %d\n", reg, ret); dev_vdbg(stmpe->dev, "rd: reg %#x (%d) => ret %#x\n", reg, length, ret); stmpe_dump_bytes("stmpe rd: ", values, length); @@ -92,11 +89,9 @@ static int __stmpe_block_write(struct stmpe *stmpe, u8 reg, u8 length, dev_vdbg(stmpe->dev, "wr: regs %#x (%d)\n", reg, length); stmpe_dump_bytes("stmpe wr: ", values, length); - ret = i2c_smbus_write_i2c_block_data(stmpe->i2c, reg, length, - values); + ret = stmpe->ci->write_block(stmpe, reg, length, values); if (ret < 0) - dev_err(stmpe->dev, "failed to write regs %#x: %d\n", - reg, ret); + dev_err(stmpe->dev, "failed to write regs %#x: %d\n", reg, ret); return ret; } @@ -874,34 +869,10 @@ static int __devinit stmpe_devices_init(struct stmpe *stmpe) return ret; } -#ifdef CONFIG_PM -static int stmpe_suspend(struct device *dev) -{ - struct i2c_client *i2c = to_i2c_client(dev); - struct stmpe *stmpe = i2c_get_clientdata(i2c); - - if (device_may_wakeup(&i2c->dev)) - enable_irq_wake(stmpe->irq); - - return 0; -} - -static int stmpe_resume(struct device *dev) +/* Called from client specific probe routines */ +int stmpe_probe(struct stmpe_client_info *ci, int partnum) { - struct i2c_client *i2c = to_i2c_client(dev); - struct stmpe *stmpe = i2c_get_clientdata(i2c); - - if (device_may_wakeup(&i2c->dev)) - disable_irq_wake(stmpe->irq); - - return 0; -} -#endif - -static int __devinit stmpe_probe(struct i2c_client *i2c, - const struct i2c_device_id *id) -{ - struct stmpe_platform_data *pdata = i2c->dev.platform_data; + struct stmpe_platform_data *pdata = dev_get_platdata(ci->dev); struct stmpe *stmpe; int ret; @@ -915,18 +886,19 @@ static int __devinit stmpe_probe(struct i2c_client *i2c, mutex_init(&stmpe->irq_lock); mutex_init(&stmpe->lock); - stmpe->dev = &i2c->dev; - stmpe->i2c = i2c; - + stmpe->dev = ci->dev; + stmpe->client = ci->client; stmpe->pdata = pdata; stmpe->irq_base = pdata->irq_base; - - stmpe->partnum = id->driver_data; - stmpe->variant = stmpe_variant_info[stmpe->partnum]; + stmpe->ci = ci; + stmpe->partnum = partnum; + stmpe->variant = stmpe_variant_info[partnum]; stmpe->regs = stmpe->variant->regs; stmpe->num_gpios = stmpe->variant->num_gpios; + dev_set_drvdata(stmpe->dev, stmpe); - i2c_set_clientdata(i2c, stmpe); + if (ci->init) + ci->init(stmpe); if (pdata->irq_over_gpio) { ret = gpio_request_one(pdata->irq_gpio, GPIOF_DIR_IN, "stmpe"); @@ -938,7 +910,7 @@ static int __devinit stmpe_probe(struct i2c_client *i2c, stmpe->irq = gpio_to_irq(pdata->irq_gpio); } else { - stmpe->irq = i2c->irq; + stmpe->irq = ci->irq; } ret = stmpe_chip_init(stmpe); @@ -950,8 +922,7 @@ static int __devinit stmpe_probe(struct i2c_client *i2c, goto free_gpio; ret = request_threaded_irq(stmpe->irq, NULL, stmpe_irq, - pdata->irq_trigger | IRQF_ONESHOT, - "stmpe", stmpe); + pdata->irq_trigger | IRQF_ONESHOT, "stmpe", stmpe); if (ret) { dev_err(stmpe->dev, "failed to request IRQ: %d\n", ret); goto out_removeirq; @@ -978,10 +949,8 @@ out_free: return ret; } -static int __devexit stmpe_remove(struct i2c_client *client) +int stmpe_remove(struct stmpe *stmpe) { - struct stmpe *stmpe = i2c_get_clientdata(client); - mfd_remove_devices(stmpe->dev); free_irq(stmpe->irq, stmpe); @@ -995,45 +964,29 @@ static int __devexit stmpe_remove(struct i2c_client *client) return 0; } -static const struct i2c_device_id stmpe_id[] = { - { "stmpe811", STMPE811 }, - { "stmpe1601", STMPE1601 }, - { "stmpe2401", STMPE2401 }, - { "stmpe2403", STMPE2403 }, - { } -}; -MODULE_DEVICE_TABLE(i2c, stmpe_id); - #ifdef CONFIG_PM -static const struct dev_pm_ops stmpe_dev_pm_ops = { - .suspend = stmpe_suspend, - .resume = stmpe_resume, -}; -#endif +static int stmpe_suspend(struct device *dev) +{ + struct stmpe *stmpe = dev_get_drvdata(dev); -static struct i2c_driver stmpe_driver = { - .driver.name = "stmpe", - .driver.owner = THIS_MODULE, -#ifdef CONFIG_PM - .driver.pm = &stmpe_dev_pm_ops, -#endif - .probe = stmpe_probe, - .remove = __devexit_p(stmpe_remove), - .id_table = stmpe_id, -}; + if (device_may_wakeup(dev)) + enable_irq_wake(stmpe->irq); -static int __init stmpe_init(void) -{ - return i2c_add_driver(&stmpe_driver); + return 0; } -subsys_initcall(stmpe_init); -static void __exit stmpe_exit(void) +static int stmpe_resume(struct device *dev) { - i2c_del_driver(&stmpe_driver); + struct stmpe *stmpe = dev_get_drvdata(dev); + + if (device_may_wakeup(dev)) + disable_irq_wake(stmpe->irq); + + return 0; } -module_exit(stmpe_exit); -MODULE_LICENSE("GPL v2"); -MODULE_DESCRIPTION("STMPE MFD core driver"); -MODULE_AUTHOR("Rabin Vincent <rabin.vincent@stericsson.com>"); +const struct dev_pm_ops stmpe_dev_pm_ops = { + .suspend = stmpe_suspend, + .resume = stmpe_resume, +}; +#endif diff --git a/drivers/mfd/stmpe.h b/drivers/mfd/stmpe.h index e4ee38956583..18d89a68ce40 100644 --- a/drivers/mfd/stmpe.h +++ b/drivers/mfd/stmpe.h @@ -8,6 +8,14 @@ #ifndef __STMPE_H #define __STMPE_H +#include <linux/device.h> +#include <linux/mfd/core.h> +#include <linux/mfd/stmpe.h> +#include <linux/printk.h> +#include <linux/types.h> + +extern const struct dev_pm_ops stmpe_dev_pm_ops; + #ifdef STMPE_DUMP_BYTES static inline void stmpe_dump_bytes(const char *str, const void *buf, size_t len) @@ -67,6 +75,31 @@ struct stmpe_variant_info { int (*enable_autosleep)(struct stmpe *stmpe, int autosleep_timeout); }; +/** + * struct stmpe_client_info - i2c or spi specific routines/info + * @data: client specific data + * @read_byte: read single byte + * @write_byte: write single byte + * @read_block: read block or multiple bytes + * @write_block: write block or multiple bytes + * @init: client init routine, called during probe + */ +struct stmpe_client_info { + void *data; + int irq; + void *client; + struct device *dev; + int (*read_byte)(struct stmpe *stmpe, u8 reg); + int (*write_byte)(struct stmpe *stmpe, u8 reg, u8 val); + int (*read_block)(struct stmpe *stmpe, u8 reg, u8 len, u8 *values); + int (*write_block)(struct stmpe *stmpe, u8 reg, u8 len, + const u8 *values); + void (*init)(struct stmpe *stmpe); +}; + +int stmpe_probe(struct stmpe_client_info *ci, int partnum); +int stmpe_remove(struct stmpe *stmpe); + #define STMPE_ICR_LSB_HIGH (1 << 2) #define STMPE_ICR_LSB_EDGE (1 << 1) #define STMPE_ICR_LSB_GIM (1 << 0) |